" -c<n> Auto-enable compaction of the oldest generation when live data is",
" at least <n>% of the maximum heap size set with -M (default: 30%)",
" -c Enable compaction for all major collections",
-#if defined(RTS_SUPPORTS_THREADS)
+#if defined(THREADED_RTS)
" -I<sec> Perform full GC after <sec> idle time (default: 0.3, 0 == off)",
#endif
"",